Home / 129,039.42-178,074.27-72,451.02

Finding the Fourth Proportional to 129,039.42, 178,074.27 and 72,451.02

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Solution

The fourth proportional to 129,039.42, 178,074.27 and 72,451.02 is: 99,982.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,039.42 : 178,074.27 = 72,451.02 : x
  2. Step 2: Convert to fraction form
    129,039.42/178,074.27 = 72,451.02/x
  3. Step 3: Cross multiply
    129,039.42x = 178,074.27 × 72,451.02
  4. Step 4: Simplify right side
    129,039.42x = 12,901,662,497.26
  5. Step 5: Solve for x
    x = 12,901,662,497.26/129,039.42
  6. Step 6: Final answer
    x = 99,982.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.